<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>borderradius</title>
    <style>
        div {
            width:150px;
            height:50px;
            position: relative;
            background: rgb(140, 98, 56);
            padding: 10px 25px 10px 10px;
            font-size: 30px;
            box-sizing: border-box;
        }
        div:after{
            position: absolute;
            content: '';
            background: red;
            width: 30px;
            height: 30px;
            border-radius: 100%;
            right: -15px;
            top: 10px;
        }

    </style>
</head>
<body>
<div></div>
<script>

</script>
</body>
</html>